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update dynamic border change
[etc/awesome.git] / layout / uselessfair.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2014,      projektile                 
6       * (c) 2013,      Luke Bonham                
7       * (c) 2012,      Josh Komoroske             
8       * (c) 2010-2012, Peter Hofmann              
9                                                   
10 --]]
11
12 local beautiful = require("beautiful")
13 local ipairs    = ipairs
14 local math      = { ceil = math.ceil, sqrt = math.sqrt }
15 local tonumber  = tonumber
16
17 local uselessfair = {}
18
19 local function fair(p, orientation)
20     -- A useless gap (like the dwm patch) can be defined with
21     -- beautiful.useless_gap_width.
22     local useless_gap = tonumber(beautiful.useless_gap_width) or 0
23     if useless_gap < 0 then useless_gap = 0 end
24
25     -- A global border can be defined with
26     -- beautiful.global_border_width.
27     local global_border = tonumber(beautiful.global_border_width) or 0
28     if global_border < 0 then global_border = 0 end
29
30     -- Themes border width requires an offset.
31     local bw = tonumber(beautiful.border_width) or 0
32
33     -- get our orientation right.
34     local wa = p.workarea
35     local cls = p.clients
36
37     wa.height = wa.height - ((global_border * 2) + (bw * 2))
38     wa.width = wa.width - ((global_border * 2) + (bw * 2))
39
40     if #cls > 0 then
41         local cells = math.ceil(math.sqrt(#cls))
42         local strips = math.ceil(#cls / cells)
43
44         local cell = 0
45         local strip = 0
46         for k, c in ipairs(cls) do
47             local g = {}
48             -- Save actual grid index for use in the useless_gap
49             -- routine.
50             local this_x = 0
51             local this_y = 0
52             if ( orientation == "east" and #cls > 2 )
53             or ( orientation == "south" and #cls <= 2 ) then
54                 if #cls < (strips * cells) and strip == strips - 1 then
55                     g.width = wa.width / (cells - ((strips * cells) - #cls))
56                 else
57                     g.width = wa.width / cells
58                 end
59                 g.height = wa.height / strips
60
61                 this_x = cell
62                 this_y = strip
63
64                 g.x = wa.x + cell * g.width + global_border
65                 g.y = wa.y + strip * g.height + global_border
66
67             else
68                 if #cls < (strips * cells) and strip == strips - 1 then
69                     g.height = wa.height / (cells - ((strips * cells) - #cls))
70                 else
71                     g.height = wa.height / cells
72                 end
73                 g.width = wa.width / strips
74
75                 this_x = strip
76                 this_y = cell
77
78                 g.x = wa.x + strip * g.width + global_border
79                 g.y = wa.y + cell * g.height + global_border
80
81             end
82
83             -- Useless gap.
84             if useless_gap > 0
85             then
86                 -- All clients tile evenly.
87                 g.width = g.width - useless_gap
88                 g.x = g.x + (useless_gap / 2)
89                 g.height = g.height - useless_gap
90                 g.y = g.y + (useless_gap / 2)
91
92             end
93             -- End of useless gap.
94
95             c:geometry(g)
96
97             cell = cell + 1
98             if cell == cells then
99                 cell = 0
100                 strip = strip + 1
101             end
102         end
103     end
104 end
105
106 --- Horizontal fair layout.
107 -- @param screen The screen to arrange.
108 uselessfair.horizontal = {}
109 uselessfair.horizontal.name = "uselessfairh"
110 function uselessfair.horizontal.arrange(p)
111     return fair(p, "east")
112 end
113
114 -- Vertical fair layout.
115 -- @param screen The screen to arrange.
116 uselessfair.name = "uselessfair"
117 function uselessfair.arrange(p)
118     return fair(p, "south")
119 end
120
121 return uselessfair